The dissatisfaction (suffering, anguish, trouble) we experience
does not happen accidentally. It is caused. The chief purpose of
Zen Buddhism is the same as the chief purpose of all Buddhist
practices, namely, the end of dissatisfaction. Ultimately, it is
ego that causes the greediness, hostility, and delusion, which are
the three poisons, that causes dissatisfaction. So the chief values
of Zen Buddhism have to do with the antidotes to these poisons.
Ego-delusion is undermined by clarity, insight, and present-moment
awareness. This is the way to freedom, the way to abiding peace and
ease.
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